Preliminary evaluation of vacuum desorption efficiency and the influence of vacuum port configuration in a calf-20 VPSA system for CO2 captureWatchara Sutaro, Chalita Ratanatawanate and Chantaraporn PhalakornkuleE3S Web Conf., 712 (2026) 02006DOI: https://doi.org/10.1051/e3sconf/202671202006